Ukiah, CA 95482 Frost Dates
When can you plant in Ukiah, CA?
Typically, the last spring freeze lands around 03/19, roughly 203 days out. The first fall frost typically arrives around 11/20, about 245 frost-free days later.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Ukiah, not a forecast for this year.
What to do before the first frost
About 12 weeks of growing season left in Ukiah before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/19 isn't a guarantee
03/19 is the middle of 30 years of NOAA records, not a promise. Plant by 02/13 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ukiah compares
At roughly 245 frost-free days, Ukiah places 7,998 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,103 of 2,555.
Learn more
the frost range covers how to read the range around Ukiah's dates instead of trusting one. local microclimates covers what one yard in Ukiah can differ from the 95482 normal.